Trait wasmtime_wasi::bindings::sync::io::poll::Host

pub trait Host: HostPollable {
    // Required method
    fn poll(&mut self, in_: Vec<Resource<Pollable>>) -> Result<Vec<u32>>;
}

Required Methods

fn poll(&mut self, in_: Vec<Resource<Pollable>>) -> Result<Vec<u32>>

Poll for completion on a set of pollables.

This function takes a list of pollables, which identify I/O sources of interest, and waits until one or more of the events is ready for I/O.

The result list<u32> contains one or more indices of handles in the argument list that is ready for I/O.

This function traps if either:

• the list is empty, or:
• the list contains more elements than can be indexed with a u32 value.

A timeout can be implemented by adding a pollable from the wasi-clocks API to the list.

This function does not return a result; polling in itself does not do any I/O so it doesn’t fail. If any of the I/O sources identified by the pollables has an error, it is indicated by marking the source as being ready for I/O.

Implementations on Foreign Types

impl<_T: Host + ?Sized> Host for &mut _T

fn poll(&mut self, in_: Vec<Resource<Pollable>>) -> Result<Vec<u32>>

Poll for completion on a set of pollables.

This function takes a list of pollables, which identify I/O sources of interest, and waits until one or more of the events is ready for I/O.

The result list<u32> contains one or more indices of handles in the argument list that is ready for I/O.

This function traps if either:

• the list is empty, or:
• the list contains more elements than can be indexed with a u32 value.

A timeout can be implemented by adding a pollable from the wasi-clocks API to the list.

This function does not return a result; polling in itself does not do any I/O so it doesn’t fail. If any of the I/O sources identified by the pollables has an error, it is indicated by marking the source as being ready for I/O.

Implementors

impl<T> Host for WasiImpl<T>

where T: WasiView,